Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D28/00—Shaping by press-cutting; Perforating
  • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
  • B21D28/12—Punching using rotatable carriers

Definitions

• the invention relates to an apparatus for working metal workpieces, comprising a frame, a rotatable tool turret movable up and down and carrying a plurality of punch tools which can be moved into a working position by rotation of the tool turret, and a die carrier carrying die tools associated with said punch tools.
• a known apparatus of this type is described in GB-A- 2 130 132.
• the die tools are supported by a stationary tool support.
• a frame section of the apparatus moves with respect to this stationary tool support, whereby the construction of this known apparatus is complicated.
• the frame is provided with a corresponding stationary rotatable tool turret as carrier for the die tools which can be moved into a corresponding working position by rotation of said tool turret.
• each tool turret comprises a detector for detecting the rotational position of the tool turret, wherein both detectors only enable the movement of the tool turret movable up and down if corresponding punch and die tools are located in the working position. In this manner errors due to an incorrect adjustment are prevented.
• both tool turrets are coupled with each other in such a.manner that upon rotation of one tool turret the other tool turret is also rotated such that in each rotational position corresponding punch and die tools are located in the working position. If such an apparatus is provided with a main plate movable up and down, it is to be preferred according to the invention that the main plate carries the tool turret movable up and down.
• FIG. 1 is a side view of an embodiment of the apparatus according to the invention.
• Fig. 2 is a front view of the apparatus of Fig. 1.
• Fig. 3 is a top view of the apparatus of Fig. 1.
• Fig. 4 shows in a larger scale a detail of the apparatus of Fig. l.
• Fig. 5 is a section according to the line V-V of Fig. 4.
• Fig. 6 is a section of the stationary tool turret of the apparatus of Fig. 1.
• Fig. 7 is a section according to the line VII-VII in Fig. l.
• Fig. 8 is a side view of a second embodiment of the apparatus according to the invention.
• Fig. 9 is a back view of the apparatus of Fig. 8.
• Fig. 10 is a side view partially shown of a third embodiment of the apparatus according to the invention.
• Fig. 11 is a partially shown top view of the apparatus of Fig. 10.
• Fig. 12 is a side view of a fourth embodiment of the apparatus according to the invention.
• the apparatus shown in Fig. 1-3 for working metal workpieces comprises a frame l made of two web plates 2 joining a base plate 3.
• a main plate 4 movable up and down is guided between the web plates 2 and is driven by a hydraulic cylinder piston assembly 5 mounted at the top side of the apparatus on the web plates 2.
• the head of a bolt 6 can be seen in Fig. 1, by means of which the main plate 4 is connected with the piston not shown of the cylinder piston assembly 5.
• the main plate 4 is enclosed between fixed guiding blocks 7 at the front side of the apparatus and adjustable guiding blocks 8 at the back side and the lower centre part of the apparatus, respectively. Suitable sliding elements can be provided between the guiding blocks 7, 8 and the main plate 4.
• the apparatus further comprises a carrier plate 9 pivotably borne in the frame 1 and connected to the main plate 4 by a bearing 10.
• the carrier plate 9 is therefore also driven through the main plate 4 by the cylinder piston assembly 5.
• the carrier plate 9 comprises a substantially triangular shear blade 11, the straight triangle sides of which enclose a right angle and form the cutting edges 12 of the shear blade 11 extending sub- stantially horizontally and vertically, respectively.
• the frame 1 supports a stationary shear blade 13 with corres ⁇ ponding cutting edges 14.
• a suitable opening 15 is provided in the web plate 2 shown in Fig. 1 for reaching and, if necessary, changing the shear blade 11, while a substantially L-shaped opening 16 is provided in the other web plate 2, so that angle workpieces and the like can be cut.
• the shear blade 11 further comprises an arcuate triangle side and is mounted in a recess of the carrier plate 9 complementary to the shear blade 11, by means of a bolt 17.
• the bolt 17 determines a shear blade axis lying at a distance from the angle as determined by the cutting edges 12, namely at the bisector of this right angle.
• a guiding element 19 is fixed to the frame 1, said guiding element carrying an elongated cam 20.
• This cam 20 engages a slot 21 of the shear blade 11, said slot extending according to the bisector of the right angle between the cutting edges 12. It is also possible to provide the shear blade 11 with the cam 20 and to provide the slot 21 in the guiding element 19.
• the location of the shear blade axis 17 at a distance of the right angle results in the advantage that the cutting forces occurring during operation at both sides of the shear blade axis 17 partially counter balance each other so that these cutting forces are taken by the engagement of the arcuate triangle side and the arcuate edge of the recess 18 in the carrier plate 9. Thereby the cam 20 is not heavily loaded. Because the main plate 4 engages the carrier plate 9 at the bearing 10, a higher cutting force is available at the location of the shear blade 11 than the force provided by the cylinder piston assembly 5. As shown in Fig. 1 and 4, the carrier plate 9 furthe carries a shear blade 22 and the frame at this location carries a counter shear blade 23 for cutting flat workpieces. Fig.
• the main plate 4 is provided with a protruding tool 24, 25 on both main surfaces.
• the tool 24 is made as a triangular punch cooperating with a die 26 supported by a corresponding web plate 2 of the frame 1.
• the tool 25 is made as a forming unit cooperating with a die 27 supported by the corresponding web plate 2 of the frame 1.
• both vertical end faces of the main plate 4 also each carry a tool 28, 29, respectively.
• the tool at the back side is made as a rectangular punch cooperating with a die 30 supported by the frame 1.
• the tool 29 is made as a rotatable tool turret and will be further explained hereinafter. It will be clear that by providing the main plate 4 with said different tools a very versatile apparatus for working metal workpieces is obtained. It is noted that the different tools 24, 25, 28, 29 as mentioned are only mentioned by way of example only and that other types of tools are also possible.
• the web plates 2 of the frame 1 are coupled with each other in a non-slidable manner above and below the main plate 4.
• one of the web plates 2 is provided with projecting key parts at its upper and lower sides in a manner not further shown, said key parts fittingly engaging slots provided at the upper and lower sides of the other web plate.
• Fig. 1 it is further indicated that the frame l and the main plate 4 are also provided with cutting tools 31 for cutting round and square workpieces.
• the tool 29 is made as a rotatable tool turret carrying six different punch tools 32. By rotating the tool turret 29 these punch tools 32 may subsequently be located in a vertically downwardly directed working position.
• a tool turret 33 which is also rotatable, is mounted on the frame 1 in a fixed position and carries die tools 34 corresponding with the different punch tools 32, which die tools may be located in an upwardly directed working position by rotation of the tool turret.
• the frame 1 further carries a detainer which, during the upward movement of the tool turret 29, prevents the workpiece to follow the punch tool 32.
• the detainer 35 is slidable on a guide 36.
• FIG. 6 shows a horizontal section of the fixed or stationary tool turret 33; the construction of the tool turre 29 fully corresponds with the same of the tool turret 33 wherein of course instead of die tools 34 punch tools 32 are provided. The construction of the tool turret 29 will not be described separately.
• the tool turret 33 comprises a carrier plate 37 attached to the web plates 2 and a round support 38 attached to this carrier plate 37, said support being stepped in section.
• a drum 39 is rotatably mounted on this round support 38, said drum 39 carrying the die tools 34 or punch tools 32.
• the drum 39 is locked in the -desired position by a locking pi
• the locking pin 40 is carried by an arm 43 received in a chamber 44 formed in the carrier plate 37.
• a shaft 45 is rotatably received in an axial cavity 46 in the support 38 an also extends rotatably the arm 43.
• a hexagonal part 47 projects through a complementary opening in a closing cap 48 of the drum 39.
• each tool turret 29, 33 is provided with a detector 50 for detecting the rotational position of the corresponding tool turret 29, 33.
• this detector 50 comprises a switch with six positions, the shaft 51 of which is coupled with the shaft 45 in a non-rotatable manner.
• Both detectors 50 are connected with the usual operating means of an apparatus of this type in such a manner that the cylinder piston assembly 5 can only drive the main plate 4 if corresponding punch and die tools are in the working position.
• the tool turrets 29, 33 in such a manner with each other that upon rotation of one tool turret for moving a tool 32, 34 into the working position, the other tool turret is automatically rotated to move the corresponding tool 34, 32 into the working position.
• This coupling can for example be a mechanical coupling through tooth belts and wheels and the like.
• FIG. 7 shows a cross section of the apparatus described at the location of the tools 24, 25, wherein the mounting of these tools to the main plate 4 is shown in more detail.
• Slots 52 are provided in the main plate 4 whereas slots 53 are provided at the side of the tools 24, 25 directed to the main plate 4, whereby projecting parts 54 are obtained. These parts 54 fittingly engage as keys in the slots 52 of the main plate 4 so that shearing forces occurring during operation are taken by this slot and key connection 52, 54.
• the tools 24, 25 are fixed to the main plate 4 by means of a plurality of draw bolts 55 at the location of the key and slot connection 52/ 54. At the upper side the tools 24, 25 are fixed by one (or more) draw bolt(s) 56, wherein spacers 57 are provided between the tools 24, 25 and the main plate 4. Of course suitable openings 58 and slots 59 are formed in the web plates 2 to provide the required freedom of movement.
• the supports for the dies 26, 27 are fixed to the web plates 2 by draw bolts 60. Between the die supports 26, 27 and the web plates a key and slot connection or the like can also be provided for taking the shearing forces. Slots 61 are provided in the main plate 4 to receive the draw bolts 60.
• the part of the apparatus with the carrier plate 9 and the shear blade 11 can also be used separately from the other parts of this apparatus. It is also possible to equip the apparatus with the tools 24, 25, 28, 29 without the use of the pivotable carrier plate 9. Further, it is possible to equip an apparatus with the tool turrets 29, 33 only, wherein the tool turret 29 is directly driven by a cylinder piston assembly.
• FIG. 8 An apparatus made in this manner is schematically shown in a side view in Fig. 8.
• the web plates 2 at the front side of the apparatus carry a guide track 100, a slide 101 being movable up and down along said track.
• the slide 101 is driven by a hydraulic cylinder piston assembly 102.
• the centre line of the cylinder piston assembly 102 coincides with the centre line of the punch tool 32 lying in the working position, whereby a very favourable force transmission is obtained.
• the slide 101 is U-shaped and carries the tool turret 29 which is borne at both sides in the U-shaped slide 101 by a schematically indicated shaft 103.
• the tool turret 33 is also borne at both sides in a U-shaped holder 105 by a schematically indicated shaft 104.
• pivotable carrier plate 9 can be driven by a hydraulic cylinder piston assembly
• the carrier plate 9 which is located in an oblique position substantially right above the pivot point of the carrier plate 9.
• the connection point between the cylinder piston assembly 106 and the carrier plate 9 lies between two boundary planes which are determined respectively by the centre lines of the pivot point of the carrier plate 9 and the hinge point connecting the cylinder piston assembly with the frame and the vertical end face 113 of the frame.
• the carrier plate 9 is equipped with a triangular shear blade not shown in the manner described.
• the carrier plate 9 also includes the cutting tools 31.
• the carrier plate 9 is also provided with a tool 28 cooperating with a die 30 supported by the frame 1.
• the carrier plate 9 is equipped with the shear blade 22 whereas the frame at this location supports a counter shear blade 23 for cutting flat workpieces.
• each web plate 2 is provided with a slot 109 as shown in a top view according to Fig. 11.
• the clearance for the movement of the slide 108 in the slots 109 is adjustable by means of an adjustment wedge 110.
• the slide 108 carriers a bending tool 111 cooperating with a die 112 supported by the frame l and having different V-shaped recesses.
• the web plates 2 at the location of the slide 109 have a flat mainly vertical end edge 113 so that the bending tool 111 and the die 112 are completely freely accessible. Thereby the material to be bent does not meet any obstructions during bending and the most fantastic shapes can be bent.
• Fig. 10 partially shows a side view of another embodiment of the apparatus according to the invention mainly corresponding with the embodiment of Fig. 8.
• the slide 108 is not coupled by a link with the pivotable carrier plate 9.
• the slide 108 is driven by a hydraulic cylinder piston assembly 114.
• This embodiment further fully corresponds with the embodiment of Fig. 8.
• Fig. 11 shows a top view of the apparatus of Fig. 10, wherein the slide 108, the slots 109 and the adjustment wedge 110 can be seen.
• the bending tool 111 is fixed to the slide 108 by means of a bolt 115 and a key 116.
• Fig. 12 shows a side view of an apparatus mainly corresponding with the embodiment of Fig. 8.
• the die tool turret 33 is supported on the frame 1 rotatably around a vertical axis 117.
• both tools 33, 34 located in a working position are located on a centre line intersecting th horizontal axis of the tool turret 29.

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Citations (4)

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• 1992
  • 1992-09-22 NL NL9201637A patent/NL9201637A/nl not_active Application Discontinuation
  • 1992-11-18 JP JP5509170A patent/JPH07501015A/ja active Pending
  • 1992-11-18 DK DK93900461.0T patent/DK0693009T3/da active
  • 1992-11-18 US US08/211,815 patent/US5483814A/en not_active Expired - Fee Related
  • 1992-11-18 WO PCT/NL1992/000207 patent/WO1993009891A1/en active IP Right Grant
  • 1992-11-18 ES ES93900461T patent/ES2097488T3/es not_active Expired - Lifetime
  • 1992-11-18 AT AT93900461T patent/ATE148842T1/de not_active IP Right Cessation
  • 1992-11-18 DE DE69217898T patent/DE69217898T2/de not_active Expired - Fee Related
  • 1992-11-18 EP EP92203540A patent/EP0550920B1/en not_active Expired - Lifetime
  • 1992-11-18 DE DE69217507T patent/DE69217507T2/de not_active Expired - Fee Related
  • 1992-11-18 EP EP93900461A patent/EP0693009B1/en not_active Expired - Lifetime

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